As far as I know Dmytry was the *only* person developing the volumetrics plugin for Mojo.
His plugin also does non-cloud volumetrics - Isosurfaces - which are a pretty cool way to get caves, overhangs, and lots of other wild terrain shapes. Perhaps most significantly Dmytry has a procedural erosion system working well enough to show some impressive demonstrations. Unfortunately that work has yet to see the light of day, and it sounds like he's currently doing some proprietary work under NDA so who knows if or when we'll see more from him publicly.
- Oshyan